Flexible bottom profile for drawn and ironed beverage can

Abstract

A bottom profile for a can in which a center domeshaped portion is provided circumscribed by an annulus which may be flat or formed with a concentric bead or provided with various shaped depressions, the annulus merging at its outer edge with the cover edge of a frustoconical portion which at its upper edge merges into the can body wall, the inner edge of the annulus merging with the marginal edge portion of the dome and the depressions defining radial arrays of ribs or strength imparting configurations of different shapes.

I claim: 
     
       1. A can for pressurized packaged products, said can comprising a cylincrical body and an integral bottom comprising a tapered peripheral portion of truncated cone-shape extending downwardly from said body, a calotte-shaped central portion projecting into the can interior, and an intermediate ring-shaped portion between said peripheral and central portions, said ring-shaped portion having a plurality of equidistantly circumferentially spaced cup-shaped dimples being defined in two circumferential directions by two walls connected in a radial outward direction by a steep wall and in a radial inward direction by a relatively shallower wall, said dimples having centers located in staggered arrangement on two concentric circles. 
     
     
       2. A can for pressurized packaged products, said can comprising a cylindrical body and an integral bottom, said bottom including an outer transition section of inverted frustoconical shape joined to said body by a radius, a generally planar intermediate ring-shaped section, and a central calotte-shaped section projecting into the interior of the can, said can bottom being characterized by stiffening deformation means in said intermediate ring-shaped section, said deformation means comprising a plurality of dimples arranged approximately equidistant on the circumference and projecting axially into the interior of said can body, said dimples 
     
     
       3. A can in accordance with claim 2 wherein said dimples situated on one of said two circles are different from said dimples situated on the other of said two circles. 
     
     
       4. A can in accordance with claim 2 wherein circumferentially adjacent ones of said dimples are in radially overlapping relation in a circumferential direction. 
     
     
       5. A can in accordance with claim 2 wherein said dimples situated on one of said two circles are different in size from said dimples situated on the other of said two circles.